Tire mold



' 393mm Bmw M wy J. c. PAYNTER Y TIRE MOLD Filed June 14, 1924 5 Sheets-Sheet l 915g @iQ/17 '54 INVENTOR Uhm U@ Jun@ M 9 i?,

www J. C.' PAYNTER TIRE MOLD Filed June 14, 1924 3 Sheets-Sheet 2 www m 1921A www@ J. C. PAYNTEIR TIRE 'MOLD Filed June 14. 1924 3 sheets-sheet 3 INVENTOR 057077/ Clifford Payder Patented June 14, 1927.

UNITED STATES tenne PATENT JOHN GLIFFORD PAYNTIER, OF PHILADELBEA, PENNSYLVANIA, ASSGNQB TU PAYN- "IER CORPORATION, 01E' PHILADELPHIA, PENNSYLVANIA, A CORPORATIGN 0F DEL- AWARE.

TIRE MQLD. y

dpllicatlon :tiled June 14, 1924. Serial No. 720,008.

My invention relates to improvements in tire molds and the art or method of molding tires in which provision is made 'for forming configurations or designs in the rubber of the outer portion of the tire.

One object oi my invention is to provide a molding ring or arc made of a plurality of interchangeable sections, 'for molding the tread or other portion of -a tire, in which the several sections are provided with molding cavities forming different characters which` when the sections are arranged in prescribed orders. convey definite meanings which serve to identity the tires on which they are to be iormed with the owner and user thereoii.

further object, of my invention is to provide the interchangeable sections oi such ring or arc with letter. numeral or symbol designs in intaglio so that when the rubber of the tire is molded in contact with the same, the letters, numerals or other symbols will appear in cameo.

A further obiect of my invention is to provide suitable mechanical means whereby such interchangeable sections may be properly held in the mold and readily removed, interohanged and replaced.

A further object o ii my invention is to vprovide a mold from which a number oi v tires of the same size may be produced, having different embossed letters. numerals and designs thereon; my improved construction obviating the necessity of engraving separate designs in rings or arcs for use with the tire mold for the purposedesired. By having a sectional ring 0r arc. with sections of segmental form and comprising the alphabet, ywith numerals and symbols to serve as spacers, the names and addresses of the bossed in the rubber thereof. Standard segmental forms having any suitable design to give the tread a complementaly appearance can be used to complete the tread ring or other annular portion of a tire when short names and addresses are to be applied.

These and-other features of my invention are hereinafter more fully described and claimed, reference being had to the following description and accompanying drawings, in which: l Y

Figure 1 is an elevation partly in section, of a tire-mold made in accordance with my invention.

Fig. 2 is a cross sectional view of the mold on the line 2 2, Fig. 1.

Fig. Bis an enlarged cross sectional view of the mold on the line 3-3, Fig. 1, showing a tire in position.

Fig. 4 is an enlarged plan view of a porn tion of the segmental tread ring developed in a fiat plane.

Fig. 5 is an enlarged plan view of one et the segmental sections making up the tread ring.

Fig. 6 is an edge view of the same.

Fig. 7 is a plan view of the finished tread of a tire developed in a flat plane.

Referring to the drawings, the main body of the mold is formed by ,two Vseparable rings or members 4, 4, each provided with a circumferential concave groove 5, which, when the rings are placed together form an annular chamber 6 to receive the carcass ot the shoe of a pneumatic tire. The ring members' 4 are detachably secured together by bolts 7 which extend through registering notches or holes 8 in flanges 9 which proiect outwardly from the members 4. To insure proper registry of the members 4 with each other when they are placed together ll provide' suitable dowel pins 18, which extend through the iianges 9.

In carrying out my invention l provide each ring member 4 with a circumferential groove 10. lin the tread portion of each section 4 of the mold; such grooves forming seats for the reception of interchangeable segmental sections 11 which t within the ycircumferential grooves 10 of the members rplace after they have been assembled in proper prescribed order, and for this purpose I provide rings 12 whioh'maybe'continuous vor segmental vas may be desired. These rings 12 have outer portions 13 fitted to annular grooves formed atthe edges of the mold ymembers 4 and inner portions or flanges 14 which extend inwardly'a'nd overlie the inner edges of the segmental sections il, and they are detachably secured .to the members e by suitable screws l which en tend through holes in the outer portions 13 of the rings 12, and which are screwed into the members 4. r)The inner surfaces 16 of the locking rings 12 coincide with the deepest surfaces of the cavities in the segmental molding sections 11 so as to form the highest portion of the tread of the tire centrally thereoi intermediatethe rows of seginern tal sections which form the name, address, or identifying marks of the owner.

lt will be noted that when the locking rings 12 are secured to the members e, the inner portions 14- and the opposing walls 17 of the grooves l0 Will hold the segmental sections 11 in place and prevent their dis placement'ifrom within the grooves until the locking rings are removed :from 'the members Ll, When the locking rings 12 are removed, the segmental molding sections l1 may be quickly and easily removed, rearranged, replaced, or substituted for others to :torni any desired name, address or other designation.

lt will be understood, oft course, that the molding walls cgt the segmental members outlining thelet'ters, figures, symbols, etc., are substantially wedge-shape so as to permit ready stripping of the molded tire Jfrom the same.

lt will be observed on reference to Fig. d of the drawings 'that 'the molding cavities ot certain of the segmental sections 11 are in 'the torni ot letters ot the alphabet, that' the cavities of ceitainother sections ll are in the form of numbers, and that the cavities of certain other sections 1l are in the form of a cross and serve as spacers for the letters and numbers. l

rlhe inner circumferential edge portions of the tire carcass are held together by two detachable rings 19, which are secured together by transverse bolts and which are seated in opposing grooves in the inner por tions of the mold members 4, as clearly shown in the drawings.

-Within the tire carcass 21 is an annular air tube 22, which is inflated through a suitable tube 23 extending outwardly between the rings 19 and which serves to press the tire carcass 21 firmly against the molding surfaces of the mold and to prevent the buckling oi' the carcass during vulcanization.

ln molding a tire carcass in accordance with my invention, and assuming that the identifying characters to be molded therein constitute the name and address of the owner and user of the tire to be molded, l proceed as follows:

l select from a suitable set of segmental sections 11 the ones which correspond with the letters and numbers and the spacers therebetween for the formation of the desired name and address, and place the seinseam lected sections in close relationship within the groove 10 of one of the mold members 4t. li the selected sections do not extend entirely around the circumferential groove 10, the remaining portion of the groove is iilled with spacer sections. The locking ring 12 is then secured to the mold member l to loci; the sections 11 in place in the groove 10 therein. Likewise, the other mold member i is provided with like segmental molding sections. The rings 19 are then applied to the clincher ribs 24 on the inner edge portions or" a tire carcass 21 having the air tube 22 therein and having a plain rubber tread portion. The carcass 21 and rings 19 are then placed within one oit the mold members 4:, and, thereafter, the other mold member 4 is placed upon the inserted carcass 21 and rings 1Q and the two members i are secured together by means of the bolts 7, conlining the carcass 21 therein. The air tube 22 within the carcass 21 is now indated, and, thereafter, the entire mold with the carcass therein is subjected to heat to effect the vulcanication in the usual manner. During vulcanisation the pressure of the air tube 22 and the flow ot the rubber causesthe rubber of the carcass to expand into and completely lill the cavities of the segmental molding sections 1l and the space between them within the locking rings 12 and thereby forms upon the tire the characters or the letters, numbers and crosses of the sections.

ln the drawings, it will be observed, that the letters, numbers and spacers form the identifying indicia R-l- Roe-k27 which may form part of a complete name and address, as Y follows: R-l-Roe-l-27-l-William-l-St-t-New-l-York.

lt will now be understood that any desired name and address may be molded in a tire by merely selecting from a suitable set of segmental molding ysections thev sections having the cavities which form the desired letters Yand numbers and the desired spacers and arranging them in the mold in the prescribed order to form the desired name and address; or the same segmental sections shown in Fig. 4 may be rearranged in a different prescribed order to form diierent identifying indicia, such for example as E-lOrr-{72.`

It will be observed that each segmental section 11 has, in addition to its central tread forming cavity which forms its letter or other characters, end treadforming cavities, and that each end tread forming cavity of each segmental section communicates with the end 'tread forming cavity of the end of the section neat adjacent thereto, so that the central cavities of the sections will mold the letters or other characters outlined thereby as a part of the tread portion of the tire and so that each two combined end cavities of the sections will mold suitably shaped bread orbions between but spaced from the treed iorrning letters or other characters, es clearly shown in Figs. 4, 5 and 7.

i claim:

l. A lhire mold comprising 'separable members forming a chamber io receive the carcass of a tire, means to secure said members together, one oi said members having an annular groove formed therein, a Set oi interchangeable molding sections seated in said groove, and e part having a molding surface debachably secured bo said grooved member end holding said sections in place therein.

2. A tire mold comprising separable members forming a chamber to receive the carcass of a rire, means to secure said members together, one of said members having an an. nular groove formed therein, a set of interchangeable molding sect-ions seated in said groove, a ring seated against said grooved section and preventing the removal of said sections from said groove, and means for detachably securing said ring to said grooved section.

In Witness whereof l have signed this 25 specication.

.JOHN enirronn rarnfrnn. 

